Melanotic macule. Benign. Dark spot on labia (or lip). Analogous to lentigo simplex. Hyperpigmented basal keratinocytes & dermal melanophages. Slight in single basal melanocytes; NO nests. More info like this in Oral melanotic macule and primary oral malignant melanoma: Epidemiology, location involved, and clinical implications ScienceDirect Melanocytic Proliferations and Other Pigmented Lesions Plastic Surgery KeyPlastic Surgery Key Oral melanoacanthoma of the palate: An unusual presentation of an uncommon entity JAAD Case Reports Oral melanoacanthoma and oral melanotic macule: a report of 8 cases, review of the literature, and immunohistochemical analysis Pigmented Lesions Pocket Dentistry